JP7199024B2 - Surface member and bathroom member - Google Patents

Description

The present invention relates to surface members and bathroom members.

BACKGROUND ART In recent years, surface members and bathroom members having high drainage properties have been widely used. For example, such surface members and bathroom members are used as floor members for bathrooms. The bathroom floor component disclosed in Patent Document 1 includes a hydrophilic-treated slanted surface and grooves having a slope arranged around the slanted surface. Hydrophilic treatment is applied. Such a bathroom floor component has high drainage.

JP-A-2004-293215

However, in the conventional bathroom floor constituent member, there is room for improvement in the drying performance of the water remaining on the bathroom floor constituent member after the water is drained.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a surface member and a bathroom member having excellent drying performance.

In order to achieve the above object, a surface member according to an aspect of the present invention is a surface member that is inclined so as to be lower in a drainage direction, and includes joint grooves provided in a grid pattern, and a grid formed by the joint grooves. and a plurality of planar portions separated into a shape, and a micro groove having hydrophilicity and having at least one of a width and a depth smaller than that of the joint groove and provided in stripes on the surface of the joint groove and the planar portion. and, when the surface member is viewed from above, the angle formed by the water discharge direction of the surface member and the extending direction of the fine grooves is larger than 0° and smaller than 90°.

Moreover, the bathroom member which concerns on 1 aspect of this invention is equipped with the said surface member.

ADVANTAGE OF THE INVENTION According to this invention, the surface member and bathroom member which have the outstanding drying performance can be provided.

FIG. 1 is a diagram showing a bathroom provided with a surface member according to an embodiment. FIG. 2A is a perspective view showing an enlarged part of the surface member according to the embodiment. FIG. 2B is an enlarged top view of the surface member in area II of FIG. 2A. FIG. 3 is a cross-sectional view of the surface member taken along line III-III of FIG. 2A. FIG. 4 is a cross-sectional view showing an enlarged part of fine grooves provided on the surface of the surface member according to the embodiment. FIG. 5 is a cross-sectional view showing an enlarged region V in FIG. FIG. 6 is a top view for explaining the extending direction of the concave portion of the fine groove according to the embodiment. FIG. 7 is a top view for explaining the behavior of the surface member according to the embodiment when water is drained. FIG. 8 is a top view for explaining the behavior of the surface member of the reference example during drying. FIG. 9 is a top view for explaining the behavior of the surface member according to the embodiment during drying. FIG. 10 is a top view illustrating a surface member according to Modification 1 of the embodiment. FIG. 11 is a top view illustrating a surface member according to modification 2 of the embodiment.

Below, the surface member which concerns on embodiment of this invention is demonstrated in detail using drawing. It should be noted that each of the embodiments described below is a specific example of the present invention. Therefore, the numerical values, shapes, materials, components, arrangement and connection of components, steps, order of steps, etc. shown in the following embodiments are examples and are not intended to limit the present invention. Therefore, among the constituent elements in the following embodiments, constituent elements not described in independent claims will be described as optional constituent elements.

Each figure is a schematic diagram and is not necessarily strictly illustrated. Therefore, for example, scales and the like do not necessarily match in each drawing. Moreover, in each figure, the same code|symbol is attached|subjected about the substantially same structure, and the overlapping description is abbreviate|omitted or simplified.

Also, in this specification, terms that indicate the relationship between elements such as parallel or orthogonal, terms that indicate the shape of elements such as squares or rectangles, and numerical ranges are not expressions that express only strict meanings, but substantial It is an expression that means that a difference of approximately several percent is also included, for example, a range equivalent to each other.

In addition, in this specification and drawings, x-axis, y-axis and z-axis indicate three axes of a three-dimensional orthogonal coordinate system. In each embodiment, the two axes parallel to the surface of the surface member are the x-axis and the y-axis, and the direction orthogonal to the surface is the z-axis direction. The positive direction of the y-axis is the primary drainage direction of the face member. The surface of the surface member is inclined with respect to the horizontal plane in order to improve drainage performance. Therefore, the z-axis direction is inclined with respect to the vertical direction.

(Embodiment)
[overview]
First, the outline of the surface member 1 according to the embodiment will be described with reference to FIG. FIG. 1 is a diagram showing a bathroom 70 provided with a surface member 1 according to this embodiment.

The surface member 1 is a bathroom floor member used for a floor 71 of a bathroom 70, as shown in FIG. The surface member 1 can quickly drain water toward a drain port 72 provided in the floor 71. - 特許庁

The surface member 1 may be provided on the bottom 74 of the bathtub 73 arranged in the bathroom 70 shown in FIG. In addition, the surface member 1 can be used as a plumbing member. In other words, the surface member 1 can be used not only for the bathroom 70 but also as a member that requires drainage. The surface member 1 may be used, for example, on the bottom of a sink in a washbasin or kitchen, on the floor of a drain or wet room or passageway, or in the interior of a washing machine.

Next, a specific configuration of the surface member 1 will be described in detail with reference to FIGS. 2A to 6. FIG.

[Constitution]
FIG. 2A is a perspective view showing an enlarged part of the surface member 1 according to this embodiment. The surface member 1 is inclined so as to be lowered in the drainage direction. The surface member 1 includes a joint groove 11 and a planar portion 12 . The surface member 1 further comprises a floor member 10. As shown in FIG. The surface member 1 has a joint groove 11 and a plurality of planar portions 12 on its upper surface. Also, as shown in FIG. 2A, the surface member 1 is inclined downward toward the drainage direction D, more specifically, at an inclination angle φ with respect to the horizontal plane. Here, the water discharge direction D is the direction in which water flows according to gravity based on the inclination angle φ of the surface member 1 when water is sprayed on the surface member 1 , for example, the direction toward the drain port 72 .

The floor member 10 corresponds to the base material of the surface member 1 . As shown in FIG. 2A, a joint groove 11 is provided on the surface of the floor member 10 . As shown in FIG. 2A , the floor member 10 has joint grooves 11 and a plurality of planar portions 12 .

The joint groove 11 is a groove provided in a grid pattern on the surface of the floor member 10 . As shown in FIG. 2A, the joint groove 11 is, for example, a through joint (also referred to as a "potato joint")-like groove, and has a plurality of lateral grooves 11a and a plurality of longitudinal grooves 11b.

The plurality of lateral grooves 11a are parallel to each other and arranged at regular intervals. The plurality of longitudinal grooves 11b are parallel to each other and arranged at regular intervals. The plurality of lateral grooves 11a and the plurality of longitudinal grooves 11b are orthogonal to each other.

The intersection 13 is a point where the lateral groove 11a and the vertical groove 11b of the joint groove 11 intersect. More specifically, there are a plurality of intersections 13, which are all the points where the plurality of lateral grooves 11a and the plurality of longitudinal grooves 11b intersect.

The planar portion 12 is partitioned by the joint grooves 11 in a grid pattern. More specifically, there are a plurality of planar portions 12, and the planar portions 12 are all surrounded by two adjacent lateral grooves 11a and two adjacent longitudinal grooves 11b. The planar portion 12 is a flat surface on the surface of the floor member 10 . The planar portion 12 is parallel to the xy plane. Note that the planar portion 12 may not be a completely flat surface, may be a gently curved surface, and may be a surface that is gently inclined with respect to the xy plane (for example, the inclination angle is less than 1°). may be

The row interval of the lateral grooves 11a and the row interval of the vertical grooves 11b are, for example, the same. In this case, the top view shape of the planar portion 12 is a square. The arrangement interval of the lateral grooves 11a and the arrangement interval of the vertical grooves 11b may be different. In this case, the top view shape of the planar portion 12 is a rectangle. Further, the lateral grooves 11a and the vertical grooves 11b may cross each other obliquely. In this case, for example, the top view shape of the planar portion 12 is a parallelogram or rhombus.

As shown in FIG. 2A , when the surface member 1 is viewed from the top, the lattice-like structure is arranged in a first direction (x-axis direction) perpendicular to the drainage direction D and a second direction (y-axis direction) parallel to the drainage direction D. Since the joint groove 11 is formed, the plurality of planar portions 12 are arranged in a matrix in each of the x-axis direction and the y-axis direction. Although the shape and size of the plurality of planar portions 12 are the same, they may be different. That is, the arrangement intervals of the plurality of lateral grooves 11a and the plurality of longitudinal grooves 11b may be uniform or different.

The maximum length of one side of the planar portion 12 is, for example, 10 mm or more and 100 mm or less, but is not limited thereto. In the present embodiment, the planar portion 12 has a rectangular top view shape, and the maximum length of one side of the planar portion 12 is the width of the planar portion 12 .

The width of each of the lateral grooves 11a and the longitudinal grooves 11b is on the order of millimeters. For example, the width of each of the lateral grooves 11a and the longitudinal grooves 11b is 1 mm or more and 4 mm or less, but is not limited to this. The width of each of the lateral grooves 11a and the longitudinal grooves 11b may be shorter than 1 mm and longer than 4 mm. The width of the lateral groove 11a is the length of the lateral groove 11a in the lateral direction (that is, the x-axis direction). The width of the vertical groove 11b is the length in the lateral direction (that is, the y-axis direction) of the vertical groove 11b.

In this embodiment, the entire floor member 10 is inclined downward toward the drainage direction D. As shown in FIG. Specifically, as shown in FIG. 2A, the lateral grooves 11a extend parallel to the drainage direction D represented by the positive direction of the y-axis. The lateral grooves 11a are inclined at an inclination angle φ with respect to the horizontal plane. The longitudinal grooves 11b extend parallel to the horizontal direction represented by the x-axis direction. The planar portion 12 is inclined at an inclination angle φ with respect to the horizontal plane.

The floor member 10 is premised on a person standing thereon. Therefore, the inclination angle φ is, for example, 1.2° or less, such as 1.1°, in order to reduce discomfort caused by the slanting floor when a person stands.

The floor member 10 is made of, for example, thermoplastic resin or thermosetting resin. Specifically, the floor member 10 is made of fiber reinforced plastics (FRP) or SMC (Sheet Molding Compound) material containing glass fibers. Alternatively, the floor member 10 may be made of artificial marble containing acrylic or polyester as a main component. The floor member 10 is formed by press molding using SMC material, for example.

The surface member 1 further comprises fine grooves 30 . Further, the fine groove 30 includes a groove-shaped concave portion 31 . The positions where the fine grooves 30 and the recesses 31 are provided will be described with reference to FIG. 2B. A detailed description of the structures of the fine grooves 30 and the recesses 31 will be given later with reference to FIGS. 4 and 5. FIG.

FIG. 2B is an enlarged top view of the surface member 1 in area II of FIG. 2A. FIG. 2B schematically shows part of the fine grooves 30 provided on the surface of the surface member 1. FIG. In addition, oblique lines illustrated as solid lines represent groove-shaped concave portions 31 provided in the fine grooves 30 . That is, in the surface member 1 according to the present embodiment, the groove-shaped concave portions 31 provided in the fine grooves 30 are provided on the surfaces of the joint groove 11 and the planar portion 12 . Specifically, the concave portions 31 of the fine grooves 30 are provided in the entire surface member 1 over the plurality of planar portions 12 and the joint grooves 11 between the plurality of planar portions 12 .

FIG. 3 is a cross-sectional view of surface member 1 taken along line III-III of FIG. 2A. Specifically, FIG. 3 shows a cross section (xz cross section) orthogonal to the lateral grooves 11a included in the joint groove 11 of the surface member 1. As shown in FIG.

As shown in FIG. 3, the surface member 1 further comprises a film member 20. As shown in FIG. The film member 20 is provided above the floor member 10 . That is, the film member 20 is formed so as to cover the joint groove 11 and the planar portion 12 .

Moreover, although the cross-sectional shape of the lateral groove 11a is an inverted trapezoid, it is not limited thereto. The cross-sectional shape of the lateral groove 11a may be V-shaped or U-shaped. The cross-sectional shape of the lateral groove 11a may be rectangular or square without taper. The cross-sectional shape of the vertical groove 11b is, for example, the same as the cross-sectional shape of the lateral groove 11a, but may be different.

FIG. 4 is a cross-sectional view showing an enlarged part of the fine grooves 30 provided on the surface of the surface member 1 according to this embodiment. Specifically, FIG. 4 is a cross-sectional view of the fine groove 30 taken along line IV-IV of the fine groove 30 shown in FIG. .

The film member 20 includes a base material 21 and a resin layer 22 . The base material 21 is a member that supports the resin layer 22 . The base material 21 is provided on the floor member 10 . Specifically, the base material 21 is provided along the joint groove 11 and the planar portion 12 of the floor member 10 .

The base material 21 is, for example, a resin film, metal foil, nonwoven fabric, or the like. Materials for the resin film include polyethylene terephthalate (PET), polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), polyvinyl acetate (PVAc), and the like. The size and shape of the base material 21 are not particularly limited. The base material 21 has an appropriate size and shape according to the purpose of use, environment of use, and the like.

The resin layer 22 is provided on the base material 21 . The resin layer 22 is formed using, for example, a photocurable resin material such as an ultraviolet curable resin. Silicone-based resins, acrylic-based resins, urethane-based resins, and the like can be used as the ultraviolet curable resin. The thickness of the resin layer 22 is, for example, 1 μm or more and 50 μm or less, but is not limited to this.

The resin layer 22 has fine grooves 30 as shown in FIG. The fine grooves 30 are provided on the upper surface of the resin layer 22 and are provided on the uppermost surface of the surface member 1 . That is, when the surface member 1 is used as a floor member or the like, the fine grooves 30 are exposed on the outermost surface.

In the present embodiment, the water contact angle θ of the material forming the fine grooves 30, that is, the material of the resin layer 22 is less than 90°. That is, the resin layer 22 is formed using a hydrophilic material.

As shown in FIG. 3 , the film member 20 is provided along the joint groove 11 and the planar portion 12 of the floor member 10 . Therefore, the fine grooves 30 provided on the upper surface of the film member 20, that is, the upper surface of the resin layer 22 are provided on the surfaces of the joint groove 11 and the planar portion 12, as described with reference to FIG. 2B. More specifically, the fine grooves 30 are provided continuously on the surfaces of the joint groove 11 and the planar portion 12 .

In addition, the fine grooves 30 are hydrophilic. Since the resin layer 22, which is the material forming the fine grooves 30, is formed using a hydrophilic material, the fine grooves 30 are hydrophilic.

Further, as shown in FIG. 4, the fine grooves 30 are provided in stripes. In other words, the fine groove 30 has a groove-shaped concave portion 31, and the concave portion 31 is provided in a stripe shape. A plurality of recesses 31 are provided side by side along a direction orthogonal to the extending direction of the recesses 31 . Moreover, a convex portion is provided between adjacent concave portions 31 . That is, the fine groove 30 has an uneven structure with a striped shape when viewed from above. The stripe shape is a shape in which a plurality of concave portions 31 extending substantially parallel to each other are arranged at predetermined intervals while extending like grooves.

Note that the stripe shape is a shape in which lines and spaces are arranged alternately and extend in the same direction, and is also called a line-and-space shape. The concave portions 31 correspond to spaces, and the convex portions existing between adjacent concave portions 31 correspond to lines. The multiple recesses 31 do not cross each other.

Although the shapes of the plurality of recesses 31 are the same as each other, they may be different from each other. Moreover, although the recessed portions 31 are arranged at equal intervals, they may be arranged at different intervals.

Due to the configuration described above, in the present embodiment, the extending direction of the fine grooves 30 and the extending direction of the concave portions 31 are the same.

The shape of the fine groove 30, particularly the shape of the concave portion 31, will be described in detail below with reference to FIG.

FIG. 5 is a cross-sectional view showing an enlarged region V in FIG. FIG. 5 shows a cross section of the concave portion 31 of the fine groove 30 of the surface member 1 according to this embodiment. FIG. 5 also shows an enlarged view of the first end portion 34a present in the opening of the recess 31 within the range surrounded by the rectangular frame of the dashed-dotted line.

In the cross section orthogonal to the direction in which the recess 31 according to the present embodiment extends, the shape of the recess 31 is an inverted trapezoid, but the shape is not limited to this. For example, the cross-sectional shape of the recess 31 may be V-shaped, U-shaped, square, rectangular, semicircular, or the like. The fine grooves 30 provided in the surface member 1 may have a plurality of recesses 31 having different cross-sectional shapes.

The recess 31 has a first side 32a, a second side 32b, a bottom 33, a first end 34a and a second end 34b. In this embodiment, the first side surface 32a, the second side surface 32b and the bottom surface 33 are each flat. The first side surface 32 a and the second side surface 32 b are inclined with respect to the bottom surface 33 . The inclination angle of the first side surface 32a with respect to the bottom surface 33 is equal to the inclination angle of the second side surface 32b with respect to the bottom surface 33, but may be different. In the present embodiment, recess 31 has a line-symmetrical shape in a cross-sectional view. That is, the cross-sectional shape of the concave portion 31 is an upside-down isosceles trapezoid.

In addition, when the cross-sectional shape is rectangular, the first side surface 32 a and the second side surface 32 b are perpendicular to the bottom surface 33 . Moreover, when the cross-sectional shape is U-shaped, the bottom surface 33 is a curved surface. Moreover, when the cross-sectional shape is V-shaped or semicircular, the recess 31 does not have the bottom surface 33 . Moreover, when the cross-sectional shape is semicircular, the first side surface 32a and the second side surface 32b are curved surfaces, and specifically, are portions of the cylindrical side surfaces having the extension direction of the recess 31 as an axis.

The first end 34a and the second end 34b are opening ends of the recess 31 in the cross section shown in FIG. 5 and are portions facing each other. Each of the first end 34a and the second end 34b is smooth.

Specifically, each of the first end 34a and the second end 34b has a curved surface with a predetermined curvature. For example, in the cross-section shown in FIG. 5, first end 34a describes a portion of a circle of radius R. As shown in FIG. The first end portion 34a is part of the side surface of the cylinder whose axis is the direction in which the concave portion 31 extends. The same applies to the second end 34b. Each of the first end portion 34a and the second end portion 34b does not include a corner, that is, does not include a plane (straight line in cross-sectional view). Also, the first end portion 34a is smoothly connected to the first side surface 32a, for example. The second end 34b is, for example, smoothly connected to the second side surface 32b.

A radius R of each of the first end portion 34a and the second end portion 34b is, for example, 100 nm or more. As a result, it is possible to prevent the resin material from remaining in the mold when the concave portion 31 is molded by the imprint method using the mold. Moreover, the radius R is, for example, 2 mm or less. As a result, for example, a highly hydrophilic material with a water contact angle of about 10° is used, and even if the depth H of the recess 31 is 100 μm or less in order to prevent dirt from accumulating in the recess 31, the recess can be 31 can smoothly wet and spread the water present in the recess 31 .

In the cross section shown in FIG. 5, A is the length along the wall surface of the recess 31 between a first point P1 on the first end portion 34a and a second point P2 on the second end portion 34b, and the first point Let B be the linear distance between P1 and the second point P2. Specifically, length A is represented by the sum of length A1, length A2, and length A3. The linear distance B corresponds to the opening width of the recess 31 .

The length A1 is the sum of the length of the curved portion from the first point P1 to the first side surface 32a at the first end 34a and the length of the straight portion of the first side surface 32a. The length A2 is the sum of the length of the curved portion from the second point P2 to the second side surface 32b at the second end 34b and the length of the straight portion of the second side surface 32b. Length A3 is the width of bottom surface 33 .

In this embodiment, the depth H and the linear distance B of the concave portion 31 are on the order of micrometers. That is, the depth H and the linear distance B are each 1 μm or more and shorter than 1 mm. Also, the depth H of the concave portion 31 means the depth of the fine groove 30 . For example, the depth H may be 5 μm or more and 150 μm or less. Also, the linear distance B may be 10 μm or more and 300 μm or less. The depth H of the concave portion 31 is the distance from the straight line connecting the first point P1 and the second point P2 to the bottom surface 33 .

In addition, the width of the concave portion 31 can be regarded as the linear distance B. As shown in FIG. Alternatively, the width of the recess 31 may be regarded as the width of the bottom surface 33, that is, the length A3. Alternatively, the width of the concave portion 31 may be regarded as the average value of the linear distance B and the length A3. Also, the width H of the recess 31 means the width of the fine groove 30 . As described above, the fine groove 30 has at least one of width and depth smaller than that of the joint groove 11 .

In the cross section shown in FIG. 5, the angle θ formed by the tangent line L2 at the first end 34a passing through the first point P1 and the horizontal plane L1 is the water contact angle θ be equivalent to. In other words, among arbitrary points on the first end portion 34a, the point at which the angle θ formed by the tangent line L2 to the first end portion 34a and the horizontal plane L1 is equal to the water contact angle θ of the film member 20 is the first point. point P1.

The same applies to the second point P2. That is, the angle formed by the tangent line at the second end 34b passing through the second point P2 and the horizontal plane L1 is also equal to the water contact angle θ. Thus, the first point P1 and the second point P2 are each determined based on the water contact angle θ. Therefore, the length A and the linear distance B determined based on the first point P1 and the second point P2 are also determined based on the water contact angle θ.

Here, an example in which the first end portion 34a and the second end portion 34b have curved surfaces is shown, but the present invention is not limited to this. The first end portion 34a and the second end portion 34b may be represented by one point in a cross-sectional view. That is, the first end portion 34a and the second end portion 34b may be edges of the upper surface of the recess 31, respectively. The first side surface 32a and the second side surface 32b may be directly connected to the edge of the upper surface of the recess 31, respectively. In this case, the first point P1 and the second point P2 respectively correspond to the edge of the upper surface of the recess 31, that is, the first end portion 34a and the second end portion 34b represented by one point in a cross-sectional view.

In the present embodiment, the length A [unit: m], the linear distance B [unit: m], and the water contact angle θ satisfy formula (1).

This corresponds to a condition in which the concave portion 31 causes capillary action along the extending direction of the concave portion 31 .

Since the recess 31 has an open upper surface corresponding to the linear distance B, the upper surface can be regarded as a completely water-repellent surface. In other words, the water contact angle of the top surface can be considered to be 180°.

Accordingly, a capillary force (capillary force) P _c [unit: N] generated by capillary action is represented by the following equation (2).

σ is the surface tension of water [unit: N/m], and S is the cross-sectional area of the concave portion 31 [unit: m ² ]. The cross-sectional area of the recess 31 corresponds to the area surrounded by the wall surface of the recess 31 and the straight line connecting the first point P1 and the second point P2 in the cross section shown in FIG.

When the capillary force P _c is greater than 0, capillary action occurs in the concave portion 31 in the extending direction of the concave portion 31 . In this way, in order for the capillary action to occur, P _c >0 holds true in equation (2), so the relationship of equation (1) described above is derived.

Capillary action occurs in the recess 31 , so that the water that has entered the recess 31 advances through the recess 31 along the extension direction of the recess 31 . That is, water tends to spread over a wide area on the surface of the surface member 1 due to capillary action. By spreading the water over a wide area, the surface area of the water exposed to the air is increased, shortening the time required for drying.

FIG. 6 is a top view for explaining the extending direction of the concave portion 31 of the fine groove 30 according to this embodiment. Specifically, FIG. 6 shows the extending direction of the joint groove 11, the planar portion 12, and the concave portion 31 corresponding to the drainage direction D in the surface member 1. As shown in FIG. In order to avoid complicating the drawing, the concave portion 31 of the fine groove 30 in FIG. 6 is schematically illustrated by a solid line, and only a portion thereof is shown.

In the surface member 1 according to the present embodiment, when the surface member 1 is viewed from above, the angle formed by the drainage direction D of the surface member 1 and the extending direction of the fine grooves 30 is larger than 0° and smaller than 90°. . Further, when the surface member 1 is viewed from above, the angle formed by the drainage direction D of the surface member 1 and the extending direction of the fine grooves 30 may be 1° or more and 89° or less. Here, for example, the angle formed by the drainage direction D of the surface member 1 and the extension direction of the fine grooves 30 is the angle formed by the drainage direction D of the surface member 1 and the extension direction of the recesses 31 of the fine grooves 30 . Specifically, in the surface member 1 shown in FIG. 6, the angle between the drainage direction D and the extending direction of the fine grooves 30 is the angle α.

Furthermore, in the present embodiment, as shown in FIG. 6, when the surface member 1 is viewed from above, grid-like meshes are formed in a first direction perpendicular to the drainage direction D and in a second direction parallel to the drainage direction D. A graben 11 is formed. The first direction perpendicular to the drainage direction D is the x-axis direction in FIG. 6, and the second direction parallel to the drainage direction D is the y-axis direction. That is, the lateral grooves 11a are formed parallel to the y-axis direction, and the vertical grooves 11b are formed parallel to the x-axis direction.

Further, as shown in FIG. 2A, the intersection 13 is the point where the lateral groove 11a and the longitudinal groove 11b of the joint groove 11 intersect. Here, the length to the intersection 13 adjacent to the intersection 13 in the first direction (x-axis direction) is set to 1 vertical unit, and the distance to the intersection 13 adjacent to the intersection 13 in the second direction (y-axis direction) Define the length of as one parallel unit. The extending direction of the concave portion 31 of the fine groove 30 according to the present embodiment is an arbitrary intersection 13, and 1 vertical unit in the first direction (x-axis direction) from the arbitrary intersection 13 and n + 0.5 parallel units in the second direction. (n is an integer equal to or greater than 0).

Specifically, FIG. 6(a) represents the case of n=0. The extending direction of the concave portion 31 of the fine groove 30 is, for example, the intersection point 13a and a point moved from the intersection point 13a by 1 vertical unit in the first direction (x-axis direction) and 0.5 parallel units in the second direction (y-axis direction). 14a and parallel to the straight line. FIG. 6(b) represents the case of n=1. The extending direction of the concave portion 31 of the fine groove 30 is, for example, the intersection point 13b and a point moved from the intersection point 13b by 1 vertical unit in the first direction (x-axis direction) and 1.5 parallel units in the second direction (y-axis direction). 14b and parallel to the straight line.

Furthermore, the extending direction of the concave portion 31 of the fine groove 30 is determined under similar conditions when n is an integer of 2 or more. Further, in the present embodiment, since the planar portion 12 is square, one vertical unit and one parallel unit have the same length. On the other hand, if the planar portion 12 is rectangular or the like, one vertical unit and one parallel unit have different lengths, but the extending direction of the recesses 31 of the fine grooves 30 is determined under similar conditions.

Further, the moved point 14a in (a) of FIG. 6 is a point moved in the negative direction in the x-axis direction and in the positive direction in the y-axis direction from the intersection 13a as a starting point, but the point is not limited to this. For example, the moved point 14a may be a point moved in the positive x-axis direction and the positive y-axis direction from the intersection 13a as a starting point. Furthermore, when n is 1 or more, similarly, the moved point 14 is a point moved in the negative direction in the x-axis direction and in the positive direction in the y-axis direction from the intersection 13 serving as the starting point, or in the positive direction in the x-axis direction. , and a point moved in the positive direction along the y-axis.

In addition, as described above, in order to avoid complicating the drawing, the concave portion 31 of the fine groove 30 in FIG. In the present embodiment, the recessed portion 31 of the fine groove 30 is provided continuously with the planar portion 12 of the surface member 1 and the joint groove 11. More specifically, the recessed portion 31 of the fine groove 30 is It is provided over the entire surface member 1 across the plurality of planar portions 12 and the joint grooves 11 between the plurality of planar portions 12 .

The surface member 1 according to this embodiment has the configuration described above.

Here, the behavior of water 60 in surface member 1 according to the present embodiment will be described with reference to FIGS. 7 to 9. FIG. Specifically, the behavior of the water 60 is the behavior of drainage and drying of the water 60 sprayed on the surface member 1 .

[Behavior during drainage]
First, the behavior during drainage will be explained. FIG. 7 is a top view for explaining the behavior of the surface member 1 according to this embodiment when water is drained. More specifically, (a) of FIG. 7 shows the state immediately after water 60 is sprayed on the surface member 1 according to the present embodiment. Further, FIG. 7(b) shows the state when the drainage is completed in the surface member 1 according to the present embodiment. Furthermore, FIG. 7(c) is a cross-sectional view (yz plane) taken along line VII-VII in FIG. 7(b). 7(a), 7(b) and 7(c), the range of the remaining water 60 is schematically indicated by dots.

When the water 60 is sprinkled on the surface member 1, most of the water 60 runs down the lateral grooves 11a in the positive direction of the y-axis due to the inclination of the surface member 1 (inclination angle φ shown in FIG. 2A). As shown in FIG. 7(a), part of the water 60 that has not flowed down falls into the joint groove 11 due to gravity and remains in the joint groove 11. As shown in FIG. At this stage, the joint groove 11 is filled with water 60 .

As time progresses further, the water 60 remaining in the joint groove 11 flows down the lateral groove 11a in the positive direction of the y-axis based on the inclination of the surface member 1 . When the water 60 remaining in the joint groove 11 becomes equal to or less than a certain amount, the water 60 in the joint groove 11 is interrupted, so that the drainage by the joint groove 11 stops. As a result, as shown in FIGS. 7(b) and 7(c), the water 60 remaining in the lateral grooves 11a is displaced from the lower side of the lateral grooves 11a (in the positive direction of the y-axis) based on the inclination of the surface member 1. side). The states of (b) and (c) of FIG. 7 are states in which the drainage is completed.

[Behavior during drying]
Next, the behavior of the water 60 during drying after completion of drainage in the surface member 1 according to the present embodiment will be described with reference to FIGS. 8 and 9. FIG.

First, FIG. 8 shows a surface member 1a of a reference example. Although the details will be described later, the surface member 1a of the reference example is one example of lower drying performance than the surface member 1 of the present embodiment.

FIG. 8 is a top view for explaining the behavior of the surface member 1a of the reference example during drying. In the surface member 1a of the reference example, except that the angle α between the drainage direction D and the extending direction of the fine grooves 30 is 90°, that is, the extending direction of the recesses 31 of the fine grooves 30 is parallel to the x-axis. It has the same components as the surface member 1 according to the present embodiment.

In FIG. 8 , the range of the remaining water 60 is schematically indicated by dots, and the direction of wetting and spreading of the water 60 is indicated by an outline arrow 61 . Also, in order to avoid complicating the drawing, the concave portion 31 of the fine groove 30 in FIG. However, in actuality, in the surface member 1a of the reference example, the recesses 31 of the fine grooves 30 extend over the plurality of planar portions 12 and the joint grooves 11 between the plurality of planar portions 12, and extend over the entire surface member 1a. is provided in

FIG. 8(a) is a diagram showing an initial state of the surface member 1a of the reference example when the water 60 begins to spread. That is, (a) of FIG. 8 shows the state immediately after the completion of the drainage shown in FIG. 7, and the state in which the drying has started. In the surface member 1a of the reference example, the angle formed by the drainage direction D and the extending direction of the concave portions 31 of the fine grooves 30 is 90°. Of the water 60 remaining in the joint groove 11, the water 60 that has entered the recess 31 advances in the recess 31 along the extension direction of the recess 31. It is the direction of 90° with respect to the drainage direction D, that is, the x-axis direction.

FIG. 8(b) is a diagram showing how the water 60 spreads further on the surface member 1a of the reference example. At this time, the concave portion 31 can pump up the water 60 from the joint groove 11 against gravity by capillary action, so the pumped-up water 60 wets and spreads from the joint groove 11 to the planar portion 12 . In this manner, the water 60 spreads over the planar portion 12 and the surface area of the water 60 that contacts the air increases, thereby promoting the evaporation of the water 60 . That is, the time required for drying the surface member 1a is shortened. Here, attention is paid to the water 60 that spreads from the lateral grooves 11aA and 11aB that are adjacent to each other in the direction of 90° with respect to the drainage direction D, that is, in the x-axis direction. As described above, the direction in which the water 60 that has entered the concave portion 31 spreads is the direction at 90° to the drainage direction D, that is, the x-axis direction. Therefore, there is a possibility that the water 60 wetting and spreading from the lateral grooves 11aA in the negative x-axis direction and the water 60 wetting and spreading in the positive x-axis direction from the lateral grooves 11aB will come into contact with each other in the region 100 of the planar portion 12 . When the water 60 wetting and spreading from the lateral grooves 11aA in the negative x-axis direction and the water 60 wetting and spreading in the positive x-axis direction from the lateral grooves 11aB come into contact with each other in the area 100 of the planar portion 12, the wetting and spreading of the water 60 is as follows. Stop. Here, the region 100 is the region on the y-axis positive direction side of the planar portion 12 among the intermediate regions between the lateral grooves 11aA and 11aB. In other words, the region 100 progresses in the x-axis negative direction from the location where the water 60 remains in the lateral groove 11aA, half the length of one side of the planar portion 12 along the x-axis direction, and extends from the location where the water 60 remains in the lateral groove 11aB. It is a region extending half the length of one side of the planar portion 12 along the x-axis direction in the positive axial direction.

On the other hand, the planar portion 12 having the region 100 also has a region 101 in which the water 60 is less likely to spread. Water 60 does not remain on the high side (negative direction side of the y-axis) of the lateral grooves 11aA and 11aB (see FIG. 7(c)) and the concave portions 31 of the fine grooves 30 extend in the x-axis direction. , a region 101 in which the water 60 does not easily spread is formed on the planar portion 12 . As described above, spreading the water 60 over a wider area shortens the time required for drying. That is, since the area 101 where the water 60 is difficult to wet and spread is not effectively used for drying, the surface member 1a of the reference example has room for improvement in drying performance.

Next, the surface member 1 according to the present embodiment, which has higher drying performance than the surface member 1a of the reference example, will be described with reference to FIG.

FIG. 9 is a top view for explaining the behavior of the surface member 1 according to this embodiment during drying. The extending direction of the concave portion 31 of the fine groove 30 in FIG. 9 is the same as in FIG. 6(a). 8, in FIG. 9, the range of the remaining water 60 is schematically indicated by dots, and the direction of wetting and spreading of the water 60 is indicated by an outline arrow 61. As shown in FIG. Also, in order to avoid complicating the drawing, the concave portions 31 of the fine grooves 30 in FIG. 9 are schematically illustrated by solid lines, and only a portion thereof is shown. However, actually, in the surface member 1 according to the present embodiment, the recesses 31 of the fine grooves 30 extend over the plurality of planar portions 12 and the joint grooves 11 between the plurality of planar portions 12. 1 is provided throughout.

(a) of FIG. 9 is a diagram showing an initial state of the surface member 1 according to the present embodiment when the water 60 starts to spread. That is, (a) of FIG. 9 shows the state immediately after the completion of the drainage shown in FIG. 7, and the state in which the drying has started. In the surface member 1, the extending direction of the concave portion 31 of the fine groove 30 is 1 vertical unit in the first direction (x-axis direction) perpendicular to the arbitrary intersection 13 and the second direction (y-axis direction) and a point 14 displaced 0.5 parallel units. That is, the extending direction of the concave portions 31 of the fine grooves 30 in the surface member 1 is the same as the extending direction shown in FIG. 6(a). Of the water 60 remaining in the joint groove 11 , the water 60 that has entered the recess 31 advances in the recess 31 along the direction in which the recess 31 extends. Therefore, the direction in which the water 60 spreads by capillary action is 1 vertical unit in the first direction (x-axis direction) perpendicular to the arbitrary intersection 13 and the second direction (y-axis direction) parallel to the arbitrary intersection 13. It is parallel to the straight line connecting the point 14 moved by 0.5 parallel units.

FIG. 9(b) is a diagram showing how the water 60 spreads further on the surface member 1 according to the present embodiment. At this time, the concave portion 31 can pump up the water 60 from the joint groove 11 against gravity by capillary action. Therefore, the pumped water 60 spreads over the planar portion 12 from the joint groove 11 . In this manner, the water 60 wets and spreads over the planar portion 12, and the surface area of the water 60 in contact with the air increases, thereby promoting the evaporation of the water 60. That is, the time required for drying the surface member 1 is shortened. Here, attention is paid to the water 60 that spreads from the lateral grooves 11aA and 11aB that are adjacent to each other in the direction of 90° with respect to the drainage direction D, that is, in the x-axis direction. As described above, the direction in which the water 60 that has entered the concave portion 31 wets and spreads is 1 vertical unit in the first direction (x-axis direction) perpendicular to the arbitrary intersection 13 and the second direction parallel to the arbitrary intersection 13 ( It is parallel to the straight line connecting the point 14 moved 0.5 parallel units in the y-axis direction). Therefore, the water 60 wetting and spreading in the negative x-axis direction and the positive y-axis direction from the lateral grooves 11aA and the water 60 wetting and spreading in the positive x-axis direction and the negative y-axis direction from the lateral grooves 11aB contact each other at the planar portion 12. It is difficult to apply and can be sufficiently wetted and spread. As a result, the surface member 1 can spread the water 60 over a wide area of the surface of the planar portion 12, thereby enhancing the drying performance.

By setting the length A and the linear distance B of the concave portion 31 of the fine groove 30 according to the present embodiment as follows, the drying performance is further improved.

In (b) of FIG. 8 and (b) of FIG. 9, the distance over which the water 60 spreads in the concave portion 31 is defined as the wetting length W [unit: m]. Wetting length W is determined based on the steady state of wetting and spreading of water 60 .

In a steady state, the capillary force (capillary force) P _c is balanced with the pressure loss P _d [unit: N] when the water 60 moves in the recess 31 at a speed v [unit: m/s]. The pressure loss _Pd is represented by the following formula (3).

In Equation (3), η is the viscosity of water [unit: Pa·s].

Furthermore, in the steady state, the amount of water flowing into the recess 31 and the amount of drying of the water 60 in the recess 31 from the water surface are balanced. The amount of water flowing in is represented by the product of the cross-sectional area S _in (=S) of the recess 31 and the velocity v. The amount of drying from the water surface is represented by the product of the surface area S _out of the water 60 inside the recess 31 and the water evaporation rate constant e [unit: m/s]. Therefore, in the steady state, the following equation (4) holds.

The surface area S _out within the recess 31 is substantially represented by the product of the width b of the recess 31 and the wetting length W. Therefore, by substituting S _out =bW into Equation (4) and rearranging, the velocity v is represented by Equation (5) below.

Since the equations (2), (3) and (5) and P _c =P _d hold, the wetting length W is expressed by the following equation (6).

Furthermore, in the present embodiment, the length A and the linear distance B are set so that the wet length W is at least half the length X [unit: m] of the largest side of the planar portion 12. is defined.

That is, the length A and the straight line distance B satisfy the following formula (7).

In the present embodiment, the planar portion 12 has a square shape in top view, and X is the width of the planar portion 12 . For example, X is the length of the planar portion 12 along the x-axis direction, as shown in FIG. 9B.

As shown in (b) of FIG. 9, the wetted length W is half or more of the maximum length X of one side of the planar portion 12, so that the surface member 1 according to the present embodiment can It has high drying performance. In the present embodiment, the wetting length W is equal to or greater than the length of one side along the x-axis direction of the square planar portion 12, for example, compared to the surface member 1a of the reference example, the present The surface member 1 according to the embodiment can shorten the time required for drying.

Specifically, as shown in (b) of FIG. 8, in the surface member 1a of the reference example, the water 60 that has spread from the lateral grooves 11aA and 11aB flows into a region 100, which is an intermediate region between the lateral grooves 11aA and 11aB. may come into contact with When the water 60 wetting and spreading from the lateral grooves 11aA and 11aB comes into contact with the region 100, wetting and spreading of the water 60 stops. That is, in the surface member 1a, even if the wetting length W is equal to or more than half the length X of the largest side of the planar portion 12, the water 60 spreads in the x-axis direction. contact, limiting wetting and spreading. That is, the wetting length W of the water 60 is limited to half of X.

On the other hand, as shown in (a) of FIG. 9, in the surface member 1 according to the present embodiment, the water 60 that spreads from the lateral grooves 11aA and 11aB does not easily contact the planar portion 12 and is sufficiently It can be spread wet. That is, in the surface member 1 , the wetting length W can spread over half or more of the maximum length X of one side of the planar portion 12 . That is, since the water 60 evaporates on the wider surface of the planar portion 12, the drying performance can be sufficiently enhanced. For example, compared to the surface member 1a of the reference example, the time required for drying when the same amount of water is sprayed is shortened to about half. Thus, according to the surface member 1 according to the present embodiment, extremely excellent drying performance can be achieved.

Moreover, the film member 20 having the fine grooves 30 is manufactured using a transfer technique using, for example, a nanoimprinting device or a roll-to-roll gravure printing device.

Specifically, a resin film is formed on the base material 21 by applying an ultraviolet curable resin material that constitutes the resin layer 22 to the surface of the base material 21 . By pressing a mold having an uneven structure for transferring the fine grooves 30 (that is, a structure in which the fine grooves 30 are inverted) against the resin film and irradiating ultraviolet rays from the substrate 21 side in the pressed state, Curing the resin film. Thereby, the resin layer 22 having the fine grooves 30 is formed. Finally, by removing the mold, the film member 20 having the fine grooves 30 is formed. The surface member 1 is manufactured by attaching the formed film member 20 to the surface of the floor member 10 .

[Effects, etc.]
As described above, the surface member 1 according to the present embodiment is a surface member 1 that is inclined so as to be lowered in the drainage direction D, and is provided with a grid-like joint groove 11 and the joint groove 11 It includes a plurality of planar portions 12 partitioned in a grid pattern. The surface member 1 according to the present embodiment is further provided in stripes on the surfaces of the joint groove 11 and the planar portion 12, and has at least one of a width and a depth smaller than that of the joint groove 11, and is hydrophilic. 30. Further, in the surface member 1 according to the present embodiment, when the surface member 1 is viewed from above, the angle α formed by the drainage direction D of the surface member 1 and the extending direction of the fine grooves 30 is greater than 0° and greater than 90°. small.

As a result, when water 60 adheres to the surface member 1 , a capillary phenomenon occurs in the concave portions 31 of the fine grooves 30 , so that the water 60 spreads in the concave portions 31 along the extending direction of the concave portions 31 by capillary force. As the water 60 spreads, the surface area of the water 60 that is in contact with the air increases, shortening the time required for drying. Furthermore, since the angle α between the drainage direction D of the surface member 1 and the extending direction of the fine grooves 30 is larger than 0° and smaller than 90°, the water spreads from two adjacent grooves in the direction of 90° with respect to the drainage direction D. The water 60 thus collected is less likely to come into contact with the planar portion 12 and can sufficiently spread. As a result, the water 60 can be spread over a wide area on the surface of the planar portion 12, thereby enhancing the drying performance.

Thus, according to this embodiment, it is possible to provide the surface member 1 having excellent drying performance.

Further, in the surface member 1 according to the present embodiment, the fine grooves 30 have a width of 10 μm or more and 300 μm or less and a depth of 5 μm or more and 150 μm or less.

Thereby, capillary action can be effectively generated. For example, when the width of the recess 31 is 10 μm or more or the depth is 5 μm or more, the cross-sectional area of the recess 31 can be ensured, and water can easily progress through the recess 31 . Further, for example, when the width of the concave portion 31 is 300 μm or less or the depth is 150 μm or less, excellent drying performance can be achieved.

Further, in the surface member 1 according to the present embodiment, when the surface member 1 is viewed from above, the grid joint grooves 11 are formed in the first direction perpendicular to the drainage direction D and the second direction parallel to the drainage direction D. be done. The points at which the grid joint grooves 11 intersect are defined as a plurality of intersections 13, the length to the intersections 13 adjacent to the intersections 13 in the first direction is defined as one vertical unit, and the intersections 13 are adjacent to the intersections 13 in the second direction. Let the length to the intersection 13 be 1 parallel unit. At this time, the extending direction of the fine groove 30 is an arbitrary intersection 13, and a point moved from the arbitrary intersection 13 by 1 vertical unit in the first direction and n + 0.5 parallel units (n is an integer of 0 or more) in the second direction. 14 and parallel to the straight line.

As a result, the water 60 that has spread from the two grooves adjacent to each other at 90° to the drainage direction D is less likely to come into contact with the planar portion 12 and can spread sufficiently. As a result, the water 60 can be spread over a wide area of the surface of the planar portion 12, so that the drying performance is further enhanced.

Further, the surface member 1 according to the present embodiment further includes a floor member 10 and a film member 20 positioned above the floor member 10. The joint groove 11 and the planar portion 12 are formed on the surface of the floor member 10. , and the fine grooves 30 are provided on the surface of the film member 20 .

Thereby, the floor member 10 and the film member 20 are manufactured separately, and the surface member 1 is obtained by providing the film member 20 above the floor member 10, which facilitates manufacturing.

Moreover, the bathroom member which concerns on this Embodiment is equipped with the surface member 1 of the said description.

As a result, when the water 60 adheres to the surface member 1 , a capillary action occurs in the recesses 31 of the fine grooves 30 . It spreads inside the concave portion 31 . As the water 60 spreads, the surface area of the water 60 that is in contact with the air increases, shortening the time required for drying.

Thus, according to this embodiment, it is possible to provide the surface member 1 having excellent drying performance.

(Modification)
Further, for example, the top view shape of the planar portion 12 may be a square, a rectangle, a parallelogram, a rhombus, or any other quadrangle. Further, when the surface member 1 is viewed from above, the grid-like joint grooves 11 may not be formed in the first direction perpendicular to the drainage direction D and the second direction parallel thereto. For example, when the surface member 1 is viewed from above, the lattice joint grooves 11 may be formed in a third direction inclined by 45° with respect to the drainage direction D and in a fourth direction perpendicular to the third direction. . As an example, the following two are shown.

FIG. 10 is a top view illustrating a surface member 1B according to Modification 1 of the present embodiment.

FIG. 10 shows the relationship between the joint groove 11B, the planar portion 12B, the concave portion 31B of the fine groove 30B, and the drainage direction DB for the surface member 1B. Here, the surface member 1B of Modification 1 of the present embodiment will be described, focusing on differences from the surface member 1 according to the present embodiment. The surface member 1B has the same configuration as the surface member 1 shown in FIG. 6A, except that the planar portion 12B has a rectangular top view shape. Specifically, it is as follows.

The joint groove 11B has horizontal grooves 11Ba and vertical grooves 11Bb, and the horizontal grooves 11Ba are arranged at different intervals than the vertical grooves 11Bb, so that the planar portion 12B is rectangular. As an example, here, a shape in which the horizontal grooves 11Ba are arranged at intervals smaller than the vertical grooves 11Bb is shown. As with the surface member 1, a direction perpendicular to the drainage direction DB is defined as a first direction, and a direction parallel thereto is defined as a second direction.

The fine groove 30B has a groove-shaped concave portion 31B, and the extending direction of the concave portion 31B is, for example, the intersection 13Ba and the second direction parallel to the intersection 13Ba and the first direction (x-axis direction) perpendicular to the intersection 13Ba. It is parallel to the straight line connecting the point 14Ba moved by 0.5 parallel unit (in the y-axis direction). By adopting such a configuration, it is possible to obtain the same effects as those of the surface member 1 according to the above-described embodiment, even if the top view shape of the planar portion 12B is different.

FIG. 11 is a top view illustrating a surface member 1C according to Modification 2 of the present embodiment. FIG. 11 shows the relationship between the joint groove 11C, the planar portion 12C, the concave portion 31C of the fine groove 30C, and the drainage direction DC for the surface member 1C. Here, the surface member 1C of Modified Example 2 of the present embodiment will be described, focusing on differences from the surface member 1 according to the present embodiment. The surface member 1C has grid-like joint grooves 11C formed in a third direction inclined at 45° with respect to the drainage direction DC and a fourth direction perpendicular to the third direction when viewed from above; It has the same configuration as the surface member 1 shown in FIG. Specifically, it is as follows.

11 C of joint grooves are formed in the 3rd direction inclined 45 degrees with respect to the drainage direction DC, and the 4th direction perpendicular|vertical to a 3rd direction in grid|lattice form. Since the drainage direction DC is the same as the positive direction of the y-axis, the third direction is a direction inclined 45° from the y-axis on the xy plane, and the fourth direction is a direction perpendicular to the third direction on the xy plane. be. Also, the joint groove 11C has a lateral groove 11Ca and a longitudinal groove 11Cb, the lateral groove 11Ca is parallel to the third direction, and the longitudinal groove 11Cb is parallel to the fourth direction. The arrangement interval of the lateral grooves 11Ca and the arrangement interval of the longitudinal grooves 11Cb are the same, and the planar portion 12C has a square shape when viewed from above.

The fine groove 30C has a groove-shaped concave portion 31C, and for example, the angle αC between the drainage direction DC and the extending direction of the fine groove 30C is 71.6°. With such a configuration, even if the grid-like joint groove 11C is formed at an angle of 45° with respect to the drainage direction DC, the same effect as that of the surface member 1 according to the above-described embodiment can be obtained. can.

With the above configuration, the appearance of the joint groove 11 and the planar portion 12 can be freely designed, and the water 60 can be sufficiently wetted and spread, so that the design is high and the dryness is high. A surface member 1 with high performance can be provided.

(others)
As described above, the surface member 1, 1B or 1C according to the present invention has been described based on the above embodiments, but the present invention is not limited to the above embodiments.

For example, in the above-described embodiment, an example in which the lateral groove 11a of the joint groove 11 is parallel to the drainage direction D (that is, the inclination direction) has been described, but the present invention is not limited to this. The joint groove 11 may be provided in a direction obliquely extending with respect to the drainage direction D.

When the surface member 1 is viewed from above, if the grid-shaped joint grooves 11 are not formed in the first direction perpendicular to the drainage direction D and the second direction parallel to the drainage direction D, the grid-shaped joint grooves 11 and the fine groove 30 may be provided so as to intersect. More specifically, both the lateral grooves 11 a and the longitudinal grooves 11 b included in the joint groove 11 may intersect with the recesses 31 included in the fine grooves 30 . Here, the term "intersection" means that the extending direction of the lateral grooves 11a and the longitudinal grooves 11b included in the joint groove 11 and the extending direction of the concave portions 31 included in the fine grooves 30 are not parallel to each other.

Further, for example, the top view shape of the planar portion 12 may not be a quadrangle such as a square, rectangle, parallelogram, or rhombus. The top view shape of the planar portion 12 may be a polygon such as a triangle or a hexagon, or may be an asymmetric figure including at least a portion of a curved line. For example, the top view shape of each of the plurality of planar portions 12 may be asymmetrical shapes different from each other. For each of the plurality of planar portions 12, when the maximum length of one side of the planar portion 12 is X, the above-described formula (7) may be satisfied. Moreover, when the maximum length of one side of at least one of the plurality of planar portions 12 is X, the above equation (7) may be satisfied. That is, when the surface member 1 includes a plurality of planar portions 12, all the planar portions 12 may satisfy the formula (7), or the planar portions 12 that do not satisfy the formula (7) may be provided. .

In addition, in the present embodiment, the entire floor member 10 is inclined downward toward the drainage direction D, but the present invention is not limited to this. For example, the floor member 10 may have a flat structure and not have a slope. Furthermore, the floor member 10 includes a joint groove 11, a planar portion 12, and a fine groove 30, and the floor member 10 is installed on a structure inclined downward toward the drainage direction D. Therefore, the surface member 1 according to the present embodiment may be used. The structure may be made of metal, resin, wood, or the like, and may be a frame structure for installing the floor member 10 having a flat plate structure.

In addition, the film member 20 may be provided with an adhesive layer. For example, the adhesive layer may be formed on the surface of the substrate 21 opposite to the surface on which the resin layer 22 is provided. The adhesive layer is composed of a film member and a material for adhering the floor member 10 . Thereby, the film member 20 can be attached to the surface of the floor member 10 .

Further, for example, the fine grooves 30 configured by the resin layer 22 may be provided directly on the upper surface of the floor member 10 having the joint grooves 11 . That is, the surface member 1 does not have to be provided with the film member 20 . Furthermore, the fine grooves 30 formed by the floor member 10 may be provided directly on the upper surface of the floor member 10 having the joint groove 11 . That is, the surface member 1 does not have to include the film member 20 and the resin layer 22 .

Further, for example, in the above embodiment, the inclination angle φ of the surface of the surface member 1 is 1.2° or less, but the inclination angle φ may be larger than 1.2°. For example, when the surface member 1 is used for a structure in which people are not expected to stand, for example, the bottom of a bathtub 73, even if the inclination angle φ is larger than 1.2°, the person should not feel discomfort during use. done. Therefore, by making the angle of inclination φ larger than 1.2°, the drainage performance can be improved.

Further, for example, the present invention may be implemented as a design method for designing the dimensions and shapes of the joint groove 11, the planar portion 12, the fine grooves 30, and the recesses 31 so as to satisfy Expression (7). Further, the present invention may be implemented as a program for executing the design method on a computer, or as a non-temporary recording medium for recording the program.

In addition, a form obtained by applying various modifications to the embodiment that a person skilled in the art can think of, and a form realized by arbitrarily combining the constituent elements and functions of each embodiment within the scope of the present invention. is also included in the present invention.

10 Floor member 11 Joint groove 12 Planar portion 13 Intersection 14 Moved point 20 Film member 30 Fine groove D Drainage direction α Angle between the drainage direction and the extending direction of the fine groove

Claims (5)

A surface member that slopes downward in the direction of drainage,
joint grooves provided in a grid pattern;
a plurality of planar portions partitioned in a grid pattern by the joint groove;
a hydrophilic fine groove provided in a stripe shape on the surface of the joint groove and the planar portion, having at least one of a width and a depth smaller than the width of the joint groove, and having hydrophilicity;
A surface member, wherein an angle between the water discharge direction of the surface member and the extending direction of the fine grooves is larger than 0° and smaller than 90° when the surface member is viewed from above. The surface member according to claim 1, wherein the fine groove has a width of 10 µm or more and 300 µm or less and a depth of 5 µm or more and 150 µm or less. When the surface member is viewed from above, the grid joint grooves are formed in a first direction perpendicular to the drainage direction and a second direction parallel to the drainage direction,
Let the points where the lattice-shaped joint grooves intersect be a plurality of intersections, and set the length to the intersections adjacent to the intersections in the first direction as one vertical unit,
When the length to the intersection adjacent to the intersection in the second direction is 1 parallel unit,
The extending direction of the fine groove is
It is parallel to a straight line that connects an arbitrary intersection and a point that is 1 vertical unit in the first direction and n+0.5 parallel units (n is an integer equal to or greater than 0) in the second direction from the arbitrary intersection. 3. The surface member according to 1 or 2. Furthermore, a floor member,
A film member positioned above the floor member,
The joint groove and the planar portion are provided on the surface of the floor member,
The surface member according to any one of claims 1 to 3, wherein the fine grooves are provided on the surface of the film member. A bathroom member comprising the surface member according to any one of claims 1 to 4.

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